<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    const obj = {
      uanme: 'zp'
    }
    function fn(x, y) {
      console.log(this)
      console.log(x + y)
    }
    fn.call(obj, 1, 2)
    fn.apply(obj, [3, 4])
    const fnu = fn.bind(obj, 5, 6)
    console.log(Math.max.apply(null, [1, 2, 3, 4, 5]))
  </script>
</body>

</html>